# Physics

> How the physical world really works, in plain language - motion, energy, light, and the genuinely strange rules of the quantum world. The 'why' beneath the machine.

8 guides.

- [What Physics Actually Is](https://themissingmanual.dev/guides/what-physics-actually-is) _(beginner)_ - Physics is the craft of predicting the world with simple models: measurement, units, and the idea that a few rules explain enormous amounts.
- [Energy, Forces, and Motion](https://themissingmanual.dev/guides/energy-forces-and-motion) _(beginner)_ - Newton without the dread: what a force really is, why things keep moving, and energy as the currency that is never created or destroyed.
- [The Quantum World, for Humans](https://themissingmanual.dev/guides/the-quantum-world-for-humans) _(intermediate)_ - What is actually true about the quantum world, minus the mysticism: superposition, uncertainty, and entanglement, explained without lying to you.
- [Light, Waves, and Fields](https://themissingmanual.dev/guides/light-waves-and-fields) _(beginner)_ - Why light, radio, sound, and ripples on a pond are the same idea: waves and fields, the electromagnetic spectrum, and what color really is.
- [Relativity: Space, Time, and Gravity](https://themissingmanual.dev/guides/relativity-space-time-and-gravity) _(intermediate)_ - Why moving clocks run slow and gravity is curved spacetime, in plain language - special and general relativity, with GPS as the everyday proof.
- [Heat, Energy, and Entropy](https://themissingmanual.dev/guides/heat-energy-and-entropy) _(intermediate)_ - The laws of thermodynamics without the dread - energy is conserved, entropy always grows, and that one-way arrow explains heat engines, perpetual-motion failure, and the direction of time.
- [Quantum Computing, for Humans](https://themissingmanual.dev/guides/quantum-computing-for-humans) _(intermediate)_ - What a quantum computer really is and is not - qubits, superposition, and interference used to make right answers likelier, not a magic box that tries all answers at once.
- [The Physics of Computation](https://themissingmanual.dev/guides/the-physics-of-computation) _(advanced)_ - A bit is a physical thing, not an abstraction - and that fact sets hard, measured limits on every computer that will ever exist, from your laptop to whatever comes after silicon.